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Open source Security tools

1 open-source tool in this category.

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Hanko

Hanko

Passkey-first auth platform — SSO, MFA, and web components without vendor lock-in.

AGPL-3.0 alternative to Clerk and Auth0. Passkeys, OAuth, SAML, Hanko Elements UI, and self-hosted Go backend — or Hanko Cloud managed.

authpasskeyssso
8.9K1KAGPL-3.0
vs Clerk

This category covers authentication and identity infrastructure. Hanko is currently the only tool listed — a passkey-first auth platform with SSO and MFA support, built to avoid vendor lock-in.

FAQ

What's the best open-source alternative to Auth0?

Hanko is the main option here, with a focus on passwordless/passkey authentication. See alternatives to Auth0 for the full comparison, including Better Auth and Firebase Auth.

Does Hanko support traditional password login too?

Hanko is built passkey-first — check its docs for password/fallback support if you need to support users without passkey-capable devices.

What are the top open-source authentication tools?

Browse alternatives to Auth0, alternatives to Better Auth, and alternatives to Firebase Auth above for more options.